Pitman connection



E. W. BURGESS.

PITMAN CONNECTION.

APPLICATION FILAED JULY 5. I916.

7: 1, 3 5 1 Patented Mar. 23, 1920.

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UNITED STATES PATENT onr ou.

EDW W. BURGESS; OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESN E ASSIGNMENTS,TO

INTERNATIONAL HARVESTER COMPANY, A CORPORATION OF NEW JERSEY.

PITMAN CONNECTION.

specification of Letters Patent. Patented Mara $3, 1920- Applicationfiled July 5, 1916. Serial No. 107,680.

' cal bearing block carried by the knife head,

wherein a pair of elastic straps secured to the body of the pitman areprovided with complemental saucer-shaped depressions forming bearingmembers adapted to operatively receive the spherical bearing blockbetween them; the object of the invention being to provide releasablespringpressed means carried by the pitman and operative to securely holdthe straps in engagement with the bearing block, and to automaticallyprevent any destructive loosening of the bearin parts relative to eachother due to wear in t e operation of the machine; the securing meansbeing easily released when it is desired to disconnect the parts. I llattain this object by means of the mechanism illustrated in theaccompanying drawing, in which t Figure 1 is a top plan view of part ofa mower pitman embodying my invention;

Fig. 2 is a side elevation of Fig. l; and Fig. 3 is a vertical crosssection of Fig. 2 on an enlarged scale taken on line 33 of Fig. 2 andlooking in the direction of the arrow points.

Referring to the drawings, wherein the same reference charactersdesignate like parts throughout the several views, 4 represents the bodyof the pitman, preferably made of wood, 5 a pitman strap secured to thefront side thereof, 6 a complemental strap secured to the rear side ofthe pitman', the straps being secured to the body of the pitman by meansof rivets 7, and BXtBIldIIl beyond the end thereof are provided witsaucer-shaped bearing members S adapted to partially receive a sphericalbearmg block 9 forming part of a knife head (not shown) The straps havesufiicient elasticity to permit them to spread apart in connecting ordisconnecting them with or from the bearing in operative relationinclude a vertica 1y disposed arm 10, having oppositely disposedtrunnion members 11 at its lower end that are journaled in the pitmanstraps, and co axially curved fingers 12 spaced apart transversely ofthe straps and adapted to receive said straps between them. The innersurfaces of the fingers are inclined outward and downward toward theirlower ends and are adapted to slidably engage with raised in clinedbosses 13 on the straps adjacent the bearing members in a manner tocontrol the position of the straps relative to the bearing blocks. 14represents a laterallyextending ear member upon the end of the bodyportion of the strap 5 and provided with an opening that slidablyreceives the reduced portion of a link 15, that is provided with anenlarged threaded portion 16 near its middle receiving an adjusting nut17, The link then turns upward and laterally, and its hook-shaped end 18is received by an opening in the upper end of the arm 10 and is retainedtherein by means of a cotter pin .19. 20 represents a compression springencircling the body of the link 15 and mac tive between the adjustingnut 17 and the ear ,member 14 in a manner to normally swing the arm 10in a direction to throw the fingers 12 into engagement with the bosses13 upon the pitman straps and thereby secure the coacting bearingmembers in operative rela tion and automatically prevent any looseningof the connected parts due to wear,

The upper end of the arm 10 is provided with a curved shoulder portion21 adapted to receive the thumb of an operator, whose fingers grasp thelower sides of the pitman straps, and pressure may then be applied in adirection tomove the fingers 12 from engagement with the bosses 13 andpermit a quick connection or disconnection of the pitman with or fromthe bearing block of the knife head.

Having shown and described one form that my invention may assume inpractice, I do not desire that it be confined to the specific details ofthe structure as illustrated, it being understood that changes may bemade in the form, proportion and organization of its associated partswithout departing from the spirit of the invention as indicated in thescope of the appended claims.

What I claim as my lnvention, and desire to secure by LettersPatent, is:

1. In a pitman connection, a pitman having a pair of straps, one of saidstraps being resilient, means including a member pivoted to said itmanfor pressing said straps toward eac other, and longitudinallyreciprocable resiliently actuated means for forcing said pivoted memberin a direction ing a pair of straps, one of said straps being resilient,means for pressing one of said straps toward the other strap, said meansincluding an arm pivoted to said pitman and having an inclined fingeradapted to cooperate with one of said straps, and reciprocable springactuated means for actuating said pivoted member.

4. In a pitman connection, a pair of elastic straps having bearingmembers thereon, and means for pressing said straps toward each other,said means including an arm pivotally connected with said straps andprovided with spaced inclined fingers slidably enga ing therewith. a p

5. n a pitman connection, a pair of elastic straps having bearingmembersthereon, means for pressing-said straps toward each other, saidmeans including inclined bosses upon the sides of said straps, and anarm pivotally connected with said straps and provided with inclinedfingers spaced apart and adapted to operatively engage with saidinclined bosses.

6. In a. pitman connection, a pair of elastic straps having bearingmembers thereon, means for presslng saidstraps toward each other, saidmeans including a spring-pressed arm pivotally connected with saidstraps and provided with inclined fingers spaced apart and slidablyengaging therewith.

7. In a pitman connection, a pair of elastic stra 5 having bearingmembers thereon, means or presslng said straps toward each other, saidmeans including an arm having one end thereof pivotally connected withsaid straps, a spring-pressed link slidably mounted on one of saidstraps and operatively connected with the opposite end of said arm, saidarm being provided with coaxially curved fingers spaced apart andslidably engaging with said straps.

8. In a plltman connection, a pair of elastic straps aving bearingmembers thereon,

. straps, coaxi posed arm pivoted between said straps coaxially curvedinclined fingers carried by said arm and engaging w1th said strap and apressure sprin reactive to norma 1y turn saidarm .111 a irection topress said bearing members toward each other.

9. In a pitman connection, a itman body a pair of elastic strapssecurec? thereto and extending beyond the end thereof and provided withhearing members, means for pressing said bearing members toward eachother, said means including a vertically disposed arm provided withoppositel disposed trunnions upon its lower end w ereby said arm ispivotally mounted upon said a ly curved fi rs carried by said arm andengaging wit the extended ends of said straps, and a spring-pressed linkslidably mounted upon one of said straps and operatively connected withthe upper end of said arm.

10. In a pitman connection, a pitman having a pair of straps one ofwhich is resilient, and means movable transverse to the longitudinalaxis of the pitman and adapted to receive said straps for forcing saidresillent strap toward the other strap.

11. In a pitman connection, a pitman having resilient straps, and meansmovable transverse to the longitudinal axis of said. pitman andembracing said straps for forcing said straps toward each other.

12. In a pitman connection, a pitman having resilient straps, and meanspivoted to said pitman and movable transverse to the longitudinal axisthereof and engaging said straps for forcing said straps toward eachother.

13. In a pitman connection, a pitman having resilient straps, and meanspivoted to and movable transverse to the longitudinal axis of saidpitman and engageable with the outer surfaces of said straps for forcingsaid straps toward each other. I

14:. In a pitman connection, a pitman having resilient straps, and meanshaving cam fingers engageable with each of said stra s and movabletransverse to the axis of sad straps for forcing the straps toward eachother. i

15. In a pitman connection, a pitman having resilient straps, and meanspivoted to, and havin cam surfaces engageable with each of sad straps,for forcing the straps toward each other.

16. In a pitman connection, a itman having resilient straps, and a memer movable across and engageable withthe outer surfaces of said strapsfor forcing the straps toward each other.

17 In a pitman connection, a pitman having resilient straps, and amember having camsurfaces movable across and engageable with the outersurfaces of said straps for ing a pair of resilient straps, said strapsforcing said straps toward each other. having bearin surfaces thereon,and means 18. In a pitman connection, a pitman havpivoted to sai pitmanand engageable with 10 ing a pair of resilient stra s, and means pivsaidsurfaces for forcing, said straps toward 5 oted to and engageable withsaid straps for each other.

forcin said strapstoward each other. In testimony whereof I afiix mysignature. 19. n a pitman connection, a pitman hav- EDWARD W. BURGESS.

